| Architecture | Number of Gates | Number of Garbage | Quantum Cost |
| Existing Comparator [23] |
| 42 | 135 |
| Existing Comparator (Peres gate and BJN gate) [15] | 24 | 16 | 80 |
| Existing Comparator (Taffoli gate and BJN gate) [15] | 32 | 16 | 128 |
| Existing Comparator (Fredkin gate and BJN gate) [15] | 40 | 48 | 184 |
| Existing Comparator (TR and BJN gate) [15] | 24 | 16 | 96 |
| Comparator proposed in [17] | 20 | 30 | 84 |
| Previous Comparator [17] | 50 | 46 | Unknown |
| Existing Comparator [24] | 32 | 34 | 112 |
| Proposed Comparator using TR gate using Full subtraction method | 18 | 18 | 98 |
| Proposed Comparator using TR gate using Half subtraction method | 24 | 24 | 64 |